Meaning of “certified copy” in the English Dictionary

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"certified copy" in Business English

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certified copynoun [ C ]

uk us plural certified copies also attested copy

a copy of a document that can be used instead of the original one because an official has checked it and formally approved it as a true and accurate copy by signing it:

To open an account, some banks demand a certified copy of your passport and proof of address.

(Definition of “certified copy” from the Cambridge Business English Dictionary © Cambridge University Press)